SiriusXM is teaming up with Amazon to offer three months of streaming radio for free to Echo Dot owners. New customers who sign up for a SiriusXM All Access or SiriusXM Premier subscription will receive one of the smart speakers featuring Amazon Alexa for free, which is a $50 savings. Plus it's the latest (third-gen) version of the device. Furthermore, SiriusXM is offering 60% off six-month All Access subscriptions right now.